Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 75 for “"Complex terrain"”.
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Locomotion of jointed figures over complex terrain
Thesis (M.S.V.S.)--Massachusetts Institute of Technology, Dept. of Architecture, 1987.
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Learning-Based Complex Terrain Navigation Under Uncertainty
In complex off-road environments, accurately identifying traversable terrain is crucial for achieving fast and reliable navigation. Existing methods learn terrain properties directly from data via self-supervision to automatically penalize trajectories moving through undesirable terrain. However, …
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An air pollution model for complex terrain
… system is presented for use in regions of complex terrain. It consists of two pre-processors and the air quality model. TERRAIN is the terrain analysis preprocessor. It accepts as input digitized terrain elevation data and analyses it in terms of the orientation and steepness of slopes. …
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Free convection and turbulent fluxes over complex terrain
The impact of complex terrain on the land-atmosphere exchange is investigated in this thesis. Here, free convection, a very effective vertical transport mechanism as turbulence is predominantly driven by buoyant forces, is explicitly addressed. Recently, it was shown for certain situations over …
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Decoupled Kinodynamic Planning for a Quadruped Robot over Complex Terrain
… feasible trajectories for legged systems across complex terrains. We decouple constraints into two separate processes. First, we rapidly sample footstep positions across a given terrain using an RRT-like search algorithm. This allows us to satisfy kinematic constraints without committing to a …
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Numerical evaluation of aerodynamic roughness of the built environment and complex terrain
… obstacles (surface roughness) and nature of the terrain (topography). In building codes and standards, average roughness is usually determined somewhat subjectively by examination of aerial photographs. For detailed wind mapping, boundary layer wind tunnel (BLWT) testing is usually recommended. …
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Spatial Downscaling and Forecasting of Atmospheric Variables over Complex Terrain Using Machine Learning
… and insurance. This is particularly necessary in complex terrain where the variability of atmospheric variables is strongly influenced by topography. Traditional Global Circulation Models (GCMs), however, typically have a coarse spatial resolution that is unable to capture local scale variations, …
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Surface water-- groundwater interaction : the spatial organization of hydrologic processes over complex terrain
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2000.
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Applicability of weight-shift microlight aircraft for measuring the turbulent exchange above complex terrain
… both approaches complement each other. However, complex terrestrial ecosystems are sparsely investigated to date, in particular over topographically structured terrain. This can be attributed to; (i) limitations in the description of boundary layer processes over non-homogenous terrain, and (ii) …
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Verification of Satellite Derived Precipitation Estimates Over Complex Terrain: A Ground Truth Analysis for Nepal
Precipitation estimates from the satellite-based Tropical Rainfall Measuring Mission (TRMM) instrumentation play a key role in flood analysis and water resource management across many regions of the world where rain gauge data are sparsely available. Previous studies have produced conflicting …
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Autonomous 3D Urban and Complex Terrain Geometry Generation and Micro-Climate Modelling Using CFD and Deep Learning
… understanding and realistic modelling of the complex interaction between climate and built environment to create safe and comfortable outdoor and indoor spaces. This necessitates unprecedented urban climate modelling at high temporal and spatial resolution. The interaction between complex …
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Forecasting the nighttime evolution of radio wave ducting in complex terrain using the MM5 numerical weather model
… conditions around the mountainous, desert terrain near Nellis Air Force Base in Nevada for five forecast periods during the summer and fall of 2002. The extent of ducting regions predicted by the model and the mechanisms that result in the development of those regions are examined. The …
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Quantifying water use by temperate deciduous forests in South Korea : roles of species diversity, canopy structure, and complex terrain
… receive more rainfall and are difficult terrains not suitable for agriculture. Because mountains are important water sources for cities and human population downstream, performing water balance for forest catchments has become a research priority. The ongoing shift from coniferous to …
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Near-Surface Air Temperature in Complex Terrain: Daily Predictions of Fine-Scale (30 m) Temperature in the Snake Range, Nevada, USA
… these results show that temperature regimes in complex terrain vary considerably over short distances and short periods of time. It is possible to create a more realistic representation of maximum and minimum temperature for a particular study area, and the topoclimate of maximum and minimum …
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Improving numerical simulation methods for the assessment of wind source availability and related power production for wind farms over complex terrain
… power production for Italian wind farms in complex terrain. The wind farms, operated by the company AGSM S.p.A., are located in two different geographical contexts: Rivoli Veronese and Affi are at the inlet of the Adige Valley, while Casoni di Romagna and Carpinaccio Firenzuola, are on the …
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Terrain and Landcover Effects of the Southern Appalachian Mountains on the Low-Level Rotational Wind Fields of Supercell Thunderstorms
… in mountains due to disruptive influences of the complex terrain is a common misperception. Multiple tornadoes occur each year in mountainous environments, including the Appalachian Mountains. Copious research examines the influences of complex terrain on large severe weather systems such as …
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Topographic Influence and Atmospheric Dynamics in the Indian Wells Valley
… scenarios. In order to better understand the terrain influenced mesoscale circulations in the varied complex terrain of Indian Wells Valley surrounding Ridgecrest, four seasonal WRF simulations were analyzed using linear shallow water theory and nonlinear theory for flows over two-dimensional …
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Mult-Scale Jet/Front Interactions that Organize Typical Cloud Seeding Environments in the Sierra Nevada
… for supercooled cloud water above the complex terrain over the Central Sierra Nevada Mountains. This environment favors cloud seeding which can enhance the local orographic precipitation. Most of the time, however, water vapor is not that significant and therefore forecasting cloud …
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Investigation of the Influence of Temperature Inversions and Turbulence on Land-atmosphere Interactions for Rolling Terrain
… to work best in horizontally uniform, flat terrain. This is a challenge for measuring surface fluxes in non-uniform, complex terrain as these models break down especially during stable atmospheric conditions. The complex terrain generates its own thermal circulation such as the drainage flow …
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